Safety attachment to elevators



2' SheetsSheet 1.

P. J SCHMITT. Safety Attachment to Elevators.

No. 223,455. Patented Jan. 13,1880.

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N-PETERS PHOTOMTHOGRAPHER, WASHINGTON. D C.

2 Sheets-Sheet 2.

P. J. SCHMITT. Safety Attachment to Elevators.

N'o.223,45,5. V Patented Jan.13,1880

'JEyJ 7 N-PETERS. PHOTO-LITHOGRAPHER. WASHINGTGN. Dv C.

UNITED STATES PATENT OFFICE.

PETER J'. SGHMITT, OF CHICAGO, ASSIGNOR OF THREE-EIGH'IHS OF HIS RIGHTTO GEORGE SIEGEL, OF OARLINVILLE, ILLINOIS.

SAFETY ATTACHMENT TO ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 223,455, dated January13, 1880.

Application filed September 8, 1879.

To all whom it may concern:

Be it known that I, PETER J ACOB ScHMrr'r, of Chicago, in the county ofCook and State of Illinois, have invented a new and useful Improvementin Safety Attachments to Elevators; and I do declare the following to bea full, clear, and exact description thereof, which will enable othersskilled in the art to which this improvement appertains to make and usethe same, reference being had to the accompanying drawings, which formpart of this specification.

This my invention relates to devices for preventing accidents with theuse of rope elevators; and it has for its object to provide additionalimprovements to the safety attachments described in Letters Patent ofthe United States granted to me on September 9, 1879, No. 219,367.

My invention consists, first, in a swinging frame having a traversingsheave which leans it against the hoist-rope and sustains the said frameat an upward position by the tension of said hoist-rope, and in thepeculiar device of connecting the said frame with a throttlevalve in thesteam-supply pipe of the engine, in such a manner that with the slackingor breaking of said hoist-rope the steam-supply to the engine will beshut .off instantly; secondly, in the connection between the tiglitenerpulley to the belt which transmits the power from the engine tothe drumshaft with the throttle-valve in the steam-supply pipe, in amanner that the breaking or slipping 0d of said belt will shut off thesteam-supply to the engine; third, in the device of connecting theswingingframe having traversing sheave, and to be upheld by the tensionof the hoist-rope, with an attachment for coupling the brakelever withthe rocker-shaft for reversing the engine, that with the breaking orslacking of the hoist-rope the brake-lever will be set free to act uponthe brake for stoppingthe drumshaft; fourth, in the device of connectingthe tightener-pulley with the coupling attachment between thebrake-lever and the rocker-shaft for reversing the engine, in a mannerthat the slipping off or breaking of the belt will set the brake-leverfree to act upon the brake for stopping the drum-shaft 5 and, fifth, -inthe of the brake and'connections.

Like letters in the several figures of the drawings designate likeparts.

A denotes the floor, and A the ceiling, of the engine'room, adjoiningthe elevator-hatchway. B is the steam-cylinder, and b the pipe supplyingsteam from the boiler to the engine,

having a stop or throttle valve, 0, operated by D is the steam-chest ofthe engine,

arm 0. and d the lever operating the reversing-valve inside of saidsteam-chest, and connected by a rod, 0, with an arm, E, of rocker-shaftF, which is journaled in hanger-bearings to the ceiling of theengined-00m. A double crank,

.G, is mounted upon the end of the rockershaft F, which, in relationwith the arm E, 00- cupies a rectangular position, and has attached theends of the elevator-controlling ropes g, passing horizontally throughthe wall and thence over sheaves vertically upward in theelevator-hatchway, so as to enable the operator to start and stop and toreverse the mo tion of the elevator by said ropes while standin g uponthe platform. H represents the driving-pulley, mounted upon the mainengineshaft h, which is journaled in an upright frame, J. Upon thedrum-shaft c", which with its end journals is pivoted between thepedestal-bearing j, is mounted a large pulley, I, with brake wheel K toone side and two spools L'l, to the other side-one for the hoist-rope Mand the other for the safety-rope m, as described in my former patent.

Power is transmitted from the driving-pulley H to the drum-shaft pulleyI by a belt, 0,.

which is stretchedtaut over said pulleys by an idler-pulley, N,journaled between the ends of two arms, a, the opposite ends of whichare pivoted to the engine-frame J, so as to permit a swinging motion forthe pulley N to ride upon the belt and tighten the same by its gravity.

The brakewheel K is embraced by two semicircular steel bands, Q, whichare pivoted with their top ends upon a stud, 0, of the pedestal j, andwith their lower ends to the diametrical opposite sides of thefulcrum-pin of brake-lever P, projected through the base of pedestal j.This brake-lever has a weight suspended, and its end is connected by arope, 2, which passes over pulleys under the ceiling, with an arm, f, ofrocker-shaft F in such a manner that when the reversing-lever d is seton a horizontal line, so as to stop the engine, the brake will hold thespool-shaft from turning; but when the lever dis swung to eitherdirection, whether above or below a horizontal line, for causing theengine to turn the shaft in either direct-ion, the brake-lever will beraised, and the spool-shaft will be free to ro tate with theengine-shaft.

The above, as far as described, relates to the usual arrangementfor ropeelevators driven by steam, and to which I lay no claim, exceptin g tothe auxiliary spool and safety-rope, which I have described in my formerpatent.

Ris a tumbler-shaft suspended in two hangerbearings under the ceiling,and having a long gravitating arm, S, and two short cranks, r and s. Tis a bell-crank, pivoted with its apex in a suitable bracket under theceiling, and having a hook formed to the end of its pendin g arm, whichwill enter a hole in the end of arm S, and will support said arm tooccupy a horizontal position. The end of the other arm of bell-crank Tis formed a loop, which is connected with the ends of two ropes, t anda. The rope t, after being carried over two pulleys underneath theceiling, connects with its opposite end to a vibratable frame, U,composed of two arms, which at their ends are connected by rods. One ofthese rods forms the fulcrum on which the frame swings in.

brackets secured to the wall, and the other one of which forms the axisfor a sheave, r, so as to have freedom to traverse thereon laterally.This sheave u will roll against the hoistrope M in a manner that thetension. of said rope will sustain the frame on an upwardlyinclinedposition, and that, if said rope breaks or becomes slack, the weight ofthe frame U will turn the bell-crank T to disengage the arm S.

The rope a, after passing over two pulleys underneath the ceiling, iscoupled with its opposite end to one of the arms a of idler-pulley N,which, with loosing its support upon the belt, from the breaking orslipping off of the latter by its gravity, will act upon the bellcrank Tto disengage the arm S.

The crank r of tumbler-shaft It, by a rope, to, which is passed over asmall pulley overhead, is connected with crank c of throttlevalve Oonsteam-supply pipe I) in such a manner that the gravity of the lever S,when disengaged froin bell-crank T, will close said valve instantly, andwill shut off the stean1- supply to the engine.

The rope z is connected with lever P by abifurcatcd bar, V, and acoupling-pin, 0c, havin g a forked head, which is pivoted to the end ofa vertical arm of a bell-crank, W, pivoted with its apex in the forkedend of a stud, a, which is secured to bar V.

The mid of the horizontal arm of the bellcrank has a weight attached,which, by its grax'ity, will hold the coupling-pin a; in its place. andis also connected to the end of a rope, Y, which, after being passedover pulleys underneath the ceiling, connects with crank s oftumbler-shaft R in such a manner that the turning of said tumbler-shaftby the gravity of arm S will extract the coupling-pin ar and will freethe brake-lever P to tighten the brake by its gravity.

As will be seen from the above description, the steamsupply to theengine and the brake will be tightened simultaneously and automaticallyin either case, whether the hoist-rope becomes slack from breakage orotherwise, or wh ether the power-transinitting belt will break or slipoff.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The tightening-pulley N of belt 0, connected with the throttle-"alveO of the engine in such a manner that the breaking or slipping off ofthe belt will shut off the steam-supply to the engine, substantially asset forth.

2. The tighteningpulley N of belt 0 and the vibratable frame U, carryingsheave r, and arranged to be sustained at an elevated position by thetension of the hoist-rope M,both connected with the throttle-valve O ofthe engine in such a manner that whether either the belt or thehoisting-rope breaks or becomes slack the supply of the steam to theengine will be shut off, substantially as described and shown.

3. The vibratable frame U, carrying sheave v, and arranged to besustained at an elevated position by the tension of the hoist-rope M, inconnection with the pin m, for coupling the brake-lever P with thereversing-gear of the engineiin such a manner that the breaking orslacking of the hoist'rope will disengage the brake-lever and will setthe brake to act upon the spool-shaft, substantially in the manner setforth.

4. The tightening-pulley N of belt 0, connected with the coupling-pin 00between the brake-lever P and the reversing-gear of the engine, so thatthe breaking or slipping off of the belt will set free the brake-leverto act upon the brake for stopping the spool-shaft, substantially as andfor the purpose described and shown.

5. The combination of the tightener-pulley N, sustained by the belt 0,with the "ibrating frame U, supported by the hoist-rope M, both said.tightener pulley and vibrating frame being connected with thecoupling-pin x, between brake-lever P and the reversing-gear oftheengine, in such a manner that whether the s will be substantially asand for the purpose set forth.

belt or hoist-rope breaks or slackens the brake set free to act upon thespool-shaft,

6. The vibratable frame U, havingsheave 2), arranged to be sustained atan elevated position by the tension of hoist-rope M, and conv nected byrope t with hook-crank T in combination with tumbler-shaft R, havinggravitating arm S and crank r, connected by rope w with crank c ofthrottle-valve O, the same being constructed to operate substantially inthe manner set forth.

7. The tightening-pulley N of belt 0, connected by rope to withhook-crank T, in combination with tumbler'shaft R, having gravitatingarm S and crank 1", connected by rope w With crank c of throttle-valveO, the same being constructed and arranged to operate substantially asset forth.

8. The coupling attachment between rockershaft F and brake-lever P,consisting of bifurcated bar V, pin m, and bellcrank W, connected byrope Y with tumbler-shaft R, having gravitating lever S and crank s, incombination with hook-crank T, connected by rope t with vibratable frameU, having sheave Q), and devised to be sustained by the tension ofhoist-rope M, the same being constructed and arranged to operatesubstantially in the manner set forth.

9. The coupling attachment between rockershaft- F, for reversing themotion of the engine, and brake-lever 1?, consisting of bifurcated barV, pin 0:, and bell-crank W, connected by rope Y with tumbler-shaft R,having gravitating lever S and crank s, in combination with hook-crankT, connected by rope t with tightening-pulley N of belt 0, the samebeing constructed and arranged substantially as described and shown.

PETER J A0013 SGHMITT.

Witnesses:

CONRAD Lnrznn, JOHN SAURRENTHALER.

